Fix wayland detection in some systems

[pedrovanzella]

Flatpak seems to be setting ${WAYLAND_DISPLAY} to an absolute path in some systems. This was causing the wayland check to fail because we were looking for the wrong path. This change should support all cases now.

[flathubbot]

Started test build 105368

[flathubbot]

Build 105368 successful To test this build, install it from the testing repository:

flatpak install --user https://dl.flathub.org/build-repo/88172/com.slack.Slack.flatpakref

[flathubbot]

Started test build 105371

[flathubbot]

Build 105371 successful To test this build, install it from the testing repository:

flatpak install --user https://dl.flathub.org/build-repo/88175/com.slack.Slack.flatpakref

[ZVNexus]

This breaks the Wayland opt in on Fedora 39 w/GNOME 45.4.

[flathubbot]

Started test build 105802

[flathubbot]

Build 105802 successful To test this build, install it from the testing repository:

flatpak install --user https://dl.flathub.org/build-repo/88609/com.slack.Slack.flatpakref

[flathubbot]

Started test build 105803

[flathubbot]

Build 105803 successful To test this build, install it from the testing repository:

flatpak install --user https://dl.flathub.org/build-repo/88610/com.slack.Slack.flatpakref

[pedrovanzella]

@ZVNexus thanks for testing! I've reverted the change that was probably causing the issue you had. I've tested the latest build locally (Arch, KDE 6) and it works for me. Can you check if it works for you as well?

[mvdan]

Thanks so much for this! Discord and Slack both stopped working on Wayland for me a few weeks ago on Arch, and after some digging, I came to the same conclusion as you. LGTM and it works for me!